Cisco warns of new SD-WAN zero-day exploited in attacks
BLUF
Active exploitation of a critical Cisco SD-WAN zero-day requires immediate patching to prevent admin privilege escalation.
NEWS
Cisco released security updates for CVE-2026-76504 affecting the Catalyst SD-WAN Manager, which allows attackers to escalate privileges to administrator level. Threat actors are actively exploiting this flaw in the wild, prompting an urgent advisory from the vendor. The vulnerability impacts customers running vulnerable versions of the SD-WAN Manager software.
Why I Care
This matters because active exploitation means networks are already at risk of compromise, potentially leading to full infrastructure takeover and data theft. Enterprise organizations relying on Cisco SD-WAN for connectivity face significant operational and security stakes if left unpatched.
Next Steps
Network administrators should apply the latest Cisco security updates immediately upon availability. Verify current software versions against the advisory list and prioritize patching internet-facing SD-WAN Manager instances within 24 hours.
Source: BleepingComputer ·